//out:../css/

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

ul,ol {
    list-style: none;
}

.container {
    position: relative;
    margin: 0 auto;
    width: 300px;
    height: 300px;
    background-color: orange;

    .banner {
        display: flex;
        overflow: hidden;

        li {
            a {
                text-decoration: none;

                img {
                    display: none;
                    width: 300px;
                    height: 300px;
                    border-radius: 10px;
                }

                &.active img {
                    display: block;
                }
            }
        }
    }

    .left,
    .right {
        position: absolute;
        top: 50%;
        width: 50px;
        height: 25px;
        // background-color: gainsboro;
        text-align: center;
        line-height: 25px;
        cursor: pointer;
    }

    .left {
        left: 0;
        transform: translate(-50%,-50%);
    }
    .right {
        right: 0;
        transform: translate(50%,-50%);
    }

    .indicator {
        position: absolute;
        display: flex;
        justify-content: center;
        width: 50px;
        height: 25px;
        left: 50%;
        bottom: 0;
        transform: translate(-50%);
        align-items: center;
        justify-content: center;

        li {
            width: 10px;
            height: 10px;
            margin: 0 auto;
            border-radius: 50%;
            background-color: aliceblue;

            &.active {
                background-color: greenyellow;
            }
        }
    }
}